# Difference between CUSTOM and PARAMS

**URL:** <https://forum.inductiveautomation.com/t/difference-between-custom-and-params/62458>\
**Category:** Ignition\
**Created:** [July 29, 2022, 10:39am UTC](https://forum.inductiveautomation.com/t/difference-between-custom-and-params/62458 "2022-07-29T10:39:07Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![sebastien\_ng](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sebastien_ng/32/55297_2.png) [@sebastien\_ng](https://forum.inductiveautomation.com/u/sebastien_ng)\
**Post date:** [July 29, 2022, 10:39am UTC](https://forum.inductiveautomation.com/t/difference-between-custom-and-params/62458/1 "2022-07-29T10:39:07Z")

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What is difference between CUSTOMN and PARAMS

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**Author:** ![pascal.fragnoud](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pascal.fragnoud/32/24728_2.png) [@pascal.fragnoud](https://forum.inductiveautomation.com/u/pascal.fragnoud)\
**Post date:** [July 29, 2022, 10:49am UTC](https://forum.inductiveautomation.com/t/difference-between-custom-and-params/62458/2 "2022-07-29T10:49:00Z")

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customs are configured directly in the view itself, params are passed to it.

If you’re familiar with programming languages, it’s pretty much the same difference as between parameters passed to a function (view parameters) and the variables defined in its scope (customs).  
Or with a class, params would be the parameters passed to its constructor when you instantiate it, customs would be its attributes.

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<div class="post-metadata">

**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\
**Post date:** [July 29, 2022, 10:52am UTC](https://forum.inductiveautomation.com/t/difference-between-custom-and-params/62458/3 "2022-07-29T10:52:04Z")

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I think you have a 'CUSTOM **N** ’typo in the title and question.

In _Perspective_,  
PARAMS

- Are read once on loading the view.
- Once the view is loaded it will not react to changes in any of the view parameters.
- Cannot take a binding.

CUSTOM

- Cannot take a parameter from another view.
- Can take a binding.

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<div class="post-metadata">

**Author:** ![sebastien\_ng](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sebastien_ng/32/55297_2.png) [@sebastien\_ng](https://forum.inductiveautomation.com/u/sebastien_ng)\
**Post date:** [August 1, 2022, 7:36am UTC](https://forum.inductiveautomation.com/t/difference-between-custom-and-params/62458/4 "2022-08-01T07:36:08Z")

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thank you